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北京工业大学 区域大气复合污染防治北京市重点实验室,北京 100214
高珂,博士,副研究员,研究方向:环境分析与环境健康,E-mail:gaoke@bjut.edu.cn
收稿日期:2025-01-05,
修回日期:2025-02-27,
录用日期:2025-03-03,
纸质出版日期:2025-08-15
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何佳豪,华凯,高珂,魏巍,鲁理平.基于全二维气相色谱-飞行时间质谱测定室内空气和颗粒物中70 种液晶单体[J].分析测试学报,2025,44(08):1585-1593.
HE Jia-hao,HUA Kai,GAO Ke,WEI Wei,LU Li-ping.Determination of 70 Liquid Crystal Monomers in Indoor Air and Particulates by Two-dimensional Gas Chromatography- Time of Flight Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(08):1585-1593.
何佳豪,华凯,高珂,魏巍,鲁理平.基于全二维气相色谱-飞行时间质谱测定室内空气和颗粒物中70 种液晶单体[J].分析测试学报,2025,44(08):1585-1593. DOI: 10.12452/j.fxcsxb.25010506.
HE Jia-hao,HUA Kai,GAO Ke,WEI Wei,LU Li-ping.Determination of 70 Liquid Crystal Monomers in Indoor Air and Particulates by Two-dimensional Gas Chromatography- Time of Flight Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(08):1585-1593. DOI: 10.12452/j.fxcsxb.25010506.
建立了一种高效分析室内空气和颗粒物中70种液晶单体(LCMs)的方法。对仪器参数、溶剂比例和超声时间进行优化后,样品经正己烷/二氯甲烷(1∶3,体积比)溶液超声提取30 min,使用全二维气相色谱-飞行时间质谱检测,实现了70种LCMs的快速、准确分析。70种LCMs在0.1~500 ng/mL范围内表现出良好的线性,方法检出限为0.01~0.87 ng/mL,空气和颗粒物在10、25、50 ng/mL加标水平下的回收率分别为62.1%~147%和73.8%~127%;相对标准偏差分别为0.55%~28%和0.15%~30%。在84份室内样本中,LCMs范围为未检出~354 pg/m³,反式,反式-4-(4-丙基双环己基-4-基)-3,4-二氟联苯(3bcHdFP)的检出率达100%,含量分别为7.99~234.38 pg/m³(空气)和23.26~164.58 pg/m³(颗粒物),表明室内普遍存在LCMs污染。该方法操作简便、精密度高,适用于室内空气和颗粒物中多种LCMs的同时定性定量分析,为室内LCMs赋存特征、来源解析及风险评估提供了技术支持。
A highly efficient method for analyzing 70 liquid crystal monomers(LCMs) in air and particulates was established. After optimizing instrument parameters,solvent ratios,and ultrasonic extraction time,samples were extracted using an
n
-hexane/dichloromethane(1∶3,volume ratio) solution with ultrasonic treatment for 30 minutes,followed by detection using comprehensive two-dimensional gas chromatography-time of flight mass spectrometry(GC×GC-TOF MS). This method enabled the rapid and accurate detection of 70 LCMs. Within the concentration range of 0.1 to 500 ng/mL,all 70 LCMs exhibited good linearity,with limits of detection ranging from 0.01 to 0.87 ng/mL. The recoveries of air and particulate samples spiked at 10,25 and 50 ng/mL ranged from 62.1% to 147% and 73.8% to 127%,respectively. The corresponding relative standard deviations were in the ranges of 0.55% to 28% and 0.15% to 30%,respectively. In 84 indoor samples
,the
LCMs concentrations ranged from not detected(ND) to 354 pg/m³.
Trans
,
trans
-4-(3,4-difluorophenyl)-4'-
n
-propylbicyclohexyl (3bcHdFP) had a detection rate of 100%,with concentrations ranging from 7.99 to 234.38 pg/m³ in air and from 23.26 to 164.58 pg/m³ in particulates,indicating the widespread presence of LCM pollution indoors. This method is simple,highly precise,and suitable for the simultaneous qualitative and quantitative analysis of multiple LCMs in indoor air and particulates,providing technical support for the characterization,source apportionment,and risk assessment of indoor LCMs contamination.
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